BEGIN; BEGIN EXPLAIN (ANALYZE, BUFFERS) select supp_nation, cust_nation, l_year, sum(volume) as revenue from ( select n1.n_name as supp_nation, n2.n_name as cust_nation, extract(year from l_shipdate) as l_year, l_extendedprice * (1 - l_discount) as volume from supplier, lineitem, orders, customer, nation n1, nation n2 where s_suppkey = l_suppkey and o_orderkey = l_orderkey and c_custkey = o_custkey and s_nationkey = n1.n_nationkey and c_nationkey = n2.n_nationkey and ( (n1.n_name = 'UNITED STATES' and n2.n_name = 'JORDAN') or (n1.n_name = 'JORDAN' and n2.n_name = 'UNITED STATES') ) and l_shipdate between date '1995-01-01' and date '1996-12-31' ) as shipping group by supp_nation, cust_nation, l_year order by supp_nation, cust_nation, l_year; QUERY PLAN --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- GroupAggregate (cost=2352737.87..2354635.51 rows=58389 width=64) (actual time=45201.790..45223.295 rows=4 loops=1) Buffers: shared hit=337290 read=1089727 -> Sort (cost=2352737.87..2352883.84 rows=58389 width=64) (actual time=45194.615..45198.054 rows=58397 loops=1) Sort Key: n1.n_name, n2.n_name, (date_part('year'::text, (lineitem.l_shipdate)::timestamp without time zone)) Sort Method: quicksort Memory: 9749kB Buffers: shared hit=337290 read=1089727 -> Hash Join (cost=894576.13..2348115.38 rows=58389 width=64) (actual time=17881.702..44930.883 rows=58397 loops=1) Hash Cond: ((lineitem.l_suppkey = supplier.s_suppkey) AND (n1.n_nationkey = supplier.s_nationkey)) Buffers: shared hit=337282 read=1089727 -> Hash Join (cost=889897.13..2313366.07 rows=1459724 width=72) (actual time=17827.430..42624.469 rows=1462654 loops=1) Hash Cond: (lineitem.l_orderkey = orders.o_orderkey) Buffers: shared hit=335100 read=1089727 -> Bitmap Heap Scan on lineitem (cost=387275.69..1727668.04 rows=18261157 width=20) (actual time=8297.371..21190.028 rows=18248249 loops=1) Recheck Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate <= '1996-12-31'::date)) Buffers: shared hit=23337 read=1089374 -> Bitmap Index Scan on lineitem_l_shipdate_l_suppkey__idx (cost=0.00..382710.40 rows=18261157 width=0) (actual time=7766.472..7766.472 rows=18248249 loops=1) Index Cond: ((l_shipdate >= '1995-01-01'::date) AND (l_shipdate <= '1996-12-31'::date)) Buffers: shared read=49815 -> Hash (cost=487618.47..487618.47 rows=1200238 width=60) (actual time=9529.281..9529.281 rows=1204054 loops=1) Buckets: 131072 Batches: 1 Memory Usage: 108177kB Buffers: shared hit=311763 read=353 -> Hash Join (cost=15638.06..487618.47 rows=1200238 width=60) (actual time=292.224..8843.292 rows=1204054 loops=1) Hash Cond: (orders.o_custkey = customer.c_custkey) Buffers: shared hit=311763 read=353 -> Seq Scan on orders (cost=0.00..403671.84 rows=15014984 width=8) (actual time=0.023..2562.286 rows=15015000 loops=1) Buffers: shared hit=253501 read=21 -> Hash (cost=14139.26..14139.26 rows=119904 width=60) (actual time=292.079..292.079 rows=119915 loops=1) Buckets: 16384 Batches: 1 Memory Usage: 10774kB Buffers: shared hit=58262 read=332 -> Nested Loop (cost=905.09..14139.26 rows=119904 width=60) (actual time=16.707..253.899 rows=119915 loops=1) Buffers: shared hit=58262 read=332 -> Nested Loop (cost=0.00..28.00 rows=2 width=60) (actual time=0.186..0.322 rows=2 loops=1) Join Filter: (((n1.n_name = 'UNITED STATES'::bpchar) AND (n2.n_name = 'JORDAN'::bpchar)) OR ((n1.n_name = 'JORDAN'::bpchar) AND (n2.n_name = 'UNITED STATES'::bpchar))) Rows Removed by Join Filter: 623 Buffers: shared hit=3 -> Index Scan using pk_nation on nation n1 (cost=0.00..12.63 rows=25 width=30) (actual time=0.019..0.041 rows=25 loops=1) Buffers: shared hit=2 -> Materialize (cost=0.00..1.38 rows=25 width=30) (actual time=0.001..0.003 rows=25 loops=25) Buffers: shared hit=1 -> Seq Scan on nation n2 (cost=0.00..1.25 rows=25 width=30) (actual time=0.008..0.015 rows=25 loops=1) Buffers: shared hit=1 -> Bitmap Heap Scan on customer (cost=905.09..6455.63 rows=60000 width=8) (actual time=16.159..116.499 rows=59958 loops=2) Recheck Cond: (c_nationkey = n2.n_nationkey) Buffers: shared hit=58259 read=332 -> Bitmap Index Scan on customer_c_nationkey_c_custkey_idx (cost=0.00..890.09 rows=60000 width=0) (actual time=10.491..10.491 rows=59958 loops=2) Index Cond: (c_nationkey = n2.n_nationkey) Buffers: shared hit=4 read=331 -> Hash (cost=3179.00..3179.00 rows=100000 width=8) (actual time=53.830..53.830 rows=100000 loops=1) Buckets: 16384 Batches: 1 Memory Usage: 3907kB Buffers: shared hit=2179 -> Seq Scan on supplier (cost=0.00..3179.00 rows=100000 width=8) (actual time=0.011..31.214 rows=100000 loops=1) Buffers: shared hit=2179 Total runtime: 45259.124 ms (53 rows) COMMIT; COMMIT